diff --git a/NewKernel_d/include/CGAL/NewKernel_d/function_objects_cartesian.h b/NewKernel_d/include/CGAL/NewKernel_d/function_objects_cartesian.h
index e1b1f6e32ae..3ca5fb3638e 100644
--- a/NewKernel_d/include/CGAL/NewKernel_d/function_objects_cartesian.h
+++ b/NewKernel_d/include/CGAL/NewKernel_d/function_objects_cartesian.h
@@ -27,6 +27,7 @@
 #include <CGAL/predicates/sign_of_determinant.h>
 #include <functional>
 #include <initializer_list>
+#include <vector>
 
 namespace CGAL {
 namespace CartesianDKernelFunctors {